72051526340 has 24 divisors (see below), whose sum is σ = 151335040920. Its totient is φ = 28815499008.

The previous prime is 72051526321. The next prime is 72051526373. The reversal of 72051526340 is 4362515027.

It can be written as a sum of positive squares in 4 ways, for example, as 38623254784 + 33428271556 = 196528^2 + 182834^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72051526340.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202847 + ... + 430406.

It is an arithmetic number, because the mean of its divisors is an integer number (6305626705).

Almost surely, 2^72051526340 is an apocalyptic number.

It is an amenable number.

72051526340 is an abundant number, since it is smaller than the sum of its proper divisors (79283514580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72051526340 is a wasteful number, since it uses less digits than its factorization.

72051526340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638951 (or 638949 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 72051526340 in words is "seventy-two billion, fifty-one million, five hundred twenty-six thousand, three hundred forty".